Right limb of atrioventricular fascicle

The right limb of the atrioventricular fascicle refers to the right bundle branch of the cardiac conduction system. This is one of the two major divisions of the atrioventricular bundle, which splits into the right and left bundle branches at the base of the muscular interventricular septum. 

The atrioventricular bundle forms an anatomical continuation of the atrioventricular node and provides the connection for electrical signals from the AV node to reach the ventricles. After extending inferiorly and leftward from the AV node past the membranous interventricular septum, the His bundle remains undivided for a few millimeters before dividing into the right and left bundle branches. The right bundle branch then conducts electrical impulses to the right ventricle, while the left bundle branch (which further divides into anterior and posterior fascicles, and often a septal fascicle) conducts to the left ventricle.